Brake mechanism



June 17, 1930. A. Y. DODGE v BRAKE MECHANISM Original Filed Oct. 8, 1924 INVENTOR ATTOR N EYS Patented June 17, 1930 aura " waste ADIEL Y. DODGE, 93 SOUTH BEND,

INDIANA, ASSIGNOR T BENDIX BE COEPANY,

A conronsrron on rumors 3am renown:

original application filed October 8, 1924, Serial No. 742,282. Divided and. this application filed May 1928. Serial No. 278,155.

My invention relates to improved brake mechanism and is embodied in a brake structure comprising a plurality of pivotally connected internal brake shoes supported within 5 a rotatable brake drum to be urged thereagainst in such a manner that one shoe is adapted to energize the other depending upon the direction of rotation of the drum and the shoes are urged against the drum by operating mechanism of a novel character drum in combination with the mechanism em- March 19, 1929.

' a bra adapted to float to adjusted positions during the application of the shoes to the drum.

A further object resides in a novel method of supporting shoes to be urged against the In the drawing let 10 indicate a rotatable brake drum within which are mounted two substantially inflexible arcuate brake shoes 12 and 16 pivotally connected bya pivot 14, carried b a link 50 mounted upon a pivot 52 carrie by the backing plate 54.

The opposite ends 22 and 26 of the shoes are slotte as at 24 and 28 to receive stationary anchors 18 and 20 carried by the backing plate. These anchors serve to anchor the shoes depending upon the direction of rotation of the drum. When the drum is rotating in a clockwise direction, anchor 20 engages shoe 16 to anchor the shoes therein and shoe 12 travels over its anchor 18 urging the shoe 16 against the drum. When the drum is traveling in the opposite direction the shoes anchor upon the member 18 in a similar manner.

Shoe 12 is provided at its extreme free end with a bearing roller 30 and shoe 16 is provided at its extreme free end with a bearing roller 32. The spring 48 tensions the shoes ,282, filed October toward each other. able stop device.

To operate the shoes I provide a floating wedge member 34 pivotally supported at 36 upon. a bell crank lever 38 mounted upon a pivot 40 carried by the backing plateand having its opposite arm 42 pivotally connected at 44 to a link 46 whereby the wedge member is moved between the shoes bearing against the rollers 30 and 32 to urge the shoes outwardly against the drum. This wedge member is adapted to travel over the anchored shoe urging the unanchored shoe outwardly.

What I claim is: Brake mechanism comprising, in combination with a rotatable brake drum, sub stantially inflexible brake shoes pivotally connected one to another said shoes arranged. within the drum and having spaced apart 58 represenm an adjustfree separable slotted ends, an anchor arranged within each slotted end to take the torque of the adjacent shoe when the drum is turned in one direction, said shoe adapted to travel over said anchor when the drum is turned in the opposite direction to urge the anchored shoe a ainst the drum, operating mechanism inclu ing a floating wedge adapted to be urged between the free ends of said shoes and a pivotally supported link carrying at its free end the pivotal connection for said shoes, said link together with the anchors providing a three-point support for the brake shoes.

In testimony whereof I, AnmL Y. DODGE, sign this specification.

ADIEL Y. DODGE. 

